The machine has been used for several years. It needs.A. to repairB. repairedC. repairD. r

问题补充：

The machine has been used for several years. It needs.

A. to repair

B. repaired

C. repair

D. repairing

答案：

A. to repair

B. repaired

C. repair

(答案→)D. repairing

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